270 Mr. E. A. Smith o?i a new Species o/" Lamellaria. 



XXVII. — Descrii^tion of a new Species o/'Lamellariay/w« 

 South Australia. By Edgae A. Smith. 



Lamellaria Wilsoni. 



Testa magna, ovata, bulimiformis, tenuis, epidermide tenui, mem- 

 In-aiiacea, lactea, lineis incrementi distinctis undulatis striata in- 

 duta ; anfractiis tres, convexi, rapide accrescentes, sutura anguste 

 canaliculata sejuncti ; apira ad apiccm obtiisa ; anfr. irltimns 

 amplissimus ; apertura OTato-pyriformis, infcrne rcccdens, intus 

 albida, inusitate magna ; peristoma tcnuissimum, membranaceum, 

 statu sieeo rugosum ; margo columellaris tenuis, arcuatus, labro 

 callo, tenuissimo, albo superne junctus. 



Longit. 37 millim.,diam. max. 28, apertura 28 longa, 17 lata. 



The animal of this species (in spirit) is globose, fleshy, of 

 a dirty yellowish colour, and marked at irregular distances 

 with conspicuous coal-black s]iots of different sizes and shapes. 

 The mantle over the back investing the shell is very thick 

 and fleshy. The foot, which is much contracted, appears to 

 be squarish in front and a little tapering behind, and has the 

 usual groove across the anterior end, forming as it were a 

 double margin. The tentacles in the contracted state are short, 

 not tapering, rather compressed, and have small prominences 

 at the outer bases bearing the minute eyes. Buccal mass 

 globular, with the flat horny jaw-plates strongly serrated at 

 the edge. Odonto])hore long and broad, bearing eighty-eight 

 rows of teeth. Each row consists of a small conical central 

 tooth, having on each side a rather smaller one of a somewhat 

 different shape, and two laterals (uncini), both of which are 

 much hooked and very acute, the outer one being considerably 

 smaller than the inner. None of the teeth, either centrals 

 or laterals, are serrated along the edges. 



From the above description it will be seen that this fine 

 species differs in some respects from the type of the genus 

 both as regards the shell and the animal. The shell has a 

 much less open mouth, and the spire is proportionally larger 

 in comparison with the body-whorl. The lingual ribbon is 

 difl'erent in detail from any of the sections into which this 

 genus has been subdivided, the non- serrate character of the 

 teeth being very peculiar. The shell most resembles that of 

 Lamellaria, but the dentition more nearly approaches that of 

 Marsenina, 



The single specimen in the Museum was presented by 



